<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Form
 * @subpackage Decorator
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** Zend_Form_Decorator_Abstract */
require_once 'Zend/Form/Decorator/Abstract.php';

/** Zend_Form_Decorator_Marker_File_Interface */
require_once 'Zend/Form/Decorator/Marker/File/Interface.php';

/** Zend_File_Transfer_Adapter_Http */
require_once 'Zend/File/Transfer/Adapter/Http.php';

/**
 * Zend_Form_Decorator_File
 *
 * Fixes the rendering for all subform and multi file elements
 *
 * @category   Zend
 * @package    Zend_Form
 * @subpackage Decorator
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: File.php 23775 2011-03-01 17:25:24Z ralph $
 */
class Zend_Form_Decorator_File extends Zend_Form_Decorator_Abstract implements Zend_Form_Decorator_Marker_File_Interface {
	/**
	 * Attributes that should not be passed to helper
	 * @var array
	 */
	protected $_attribBlacklist = array ('helper', 'placement', 'separator', 'value' );
	
	/**
	 * Default placement: append
	 * @var string
	 */
	protected $_placement = 'APPEND';
	
	/**
	 * Get attributes to pass to file helper
	 *
	 * @return array
	 */
	public function getAttribs() {
		$attribs = $this->getOptions ();
		
		if (null !== ($element = $this->getElement ())) {
			$attribs = array_merge ( $attribs, $element->getAttribs () );
		}
		
		foreach ( $this->_attribBlacklist as $key ) {
			if (array_key_exists ( $key, $attribs )) {
				unset ( $attribs [$key] );
			}
		}
		
		return $attribs;
	}
	
	/**
	 * Render a form file
	 *
	 * @param  string $content
	 * @return string
	 */
	public function render($content) {
		$element = $this->getElement ();
		if (! $element instanceof Zend_Form_Element) {
			return $content;
		}
		
		$view = $element->getView ();
		if (! $view instanceof Zend_View_Interface) {
			return $content;
		}
		
		$name = $element->getName ();
		$attribs = $this->getAttribs ();
		if (! array_key_exists ( 'id', $attribs )) {
			$attribs ['id'] = $name;
		}
		
		$separator = $this->getSeparator ();
		$placement = $this->getPlacement ();
		$markup = array ();
		$size = $element->getMaxFileSize ();
		if ($size > 0) {
			$element->setMaxFileSize ( 0 );
			$markup [] = $view->formHidden ( 'MAX_FILE_SIZE', $size );
		}
		
		if (Zend_File_Transfer_Adapter_Http::isApcAvailable ()) {
			$markup [] = $view->formHidden ( ini_get ( 'apc.rfc1867_name' ), uniqid (), array ('id' => 'progress_key' ) );
		} else if (Zend_File_Transfer_Adapter_Http::isUploadProgressAvailable ()) {
			$markup [] = $view->formHidden ( 'UPLOAD_IDENTIFIER', uniqid (), array ('id' => 'progress_key' ) );
		}
		
		if ($element->isArray ()) {
			$name .= "[]";
			$count = $element->getMultiFile ();
			for($i = 0; $i < $count; ++ $i) {
				$htmlAttribs = $attribs;
				$htmlAttribs ['id'] .= '-' . $i;
				$markup [] = $view->formFile ( $name, $htmlAttribs );
			}
		} else {
			$markup [] = $view->formFile ( $name, $attribs );
		}
		
		$markup = implode ( $separator, $markup );
		
		switch ($placement) {
			case self::PREPEND :
				return $markup . $separator . $content;
			case self::APPEND :
			default :
				return $content . $separator . $markup;
		}
	}
}
